Pulley



Oct. 4 1927.

E. M. ADAMS PULLEY 2 Sheets-Sheet l Filed Sept. 4 1925 Edward M. fidams5y Oct, 4,1927. 1,644,164

' E. M. ADAMS PULLEY Filed t, 4 1925 2 Sheets-Sheet 2 Patented Oct. 4,1927.

UNITED STATES- EDWARD M. ADAMS, OF LENNOXVILLE, QUEBEC, CANADA.

PULLEY.

Application filed September 4, 1925.

This invention relates generally to improvements in rope pulleys andmore particularly to light duty pulleys, such as are used for clotheslines and the like, and the object of the invention is to provide aninexpensive, durable and efficient pulley.

. A further object is to provide a pulley having the frame soconstructed that a rope travelling in the sheave is positively heldagainst escape from the groove of the sheave and also from bindingbetween the sheave and frame. I a

A still further object is to provide a pulley of this type in which'theframe is composed of wire in sections easily manufactured and assembled.

Various other objects and the advantages of the invention may beascertained from the following description.

' A pulley formed according to this invention comprises essentially agrooved sheave pivotally mounted in a frame composed of two similarsections connected to one another and to a strap member by which thepulley is suspended.

In the accompanying drawings 'which illustrate one embodiment of theinvention and one of many possible modifications;'-

Fig. 1 is a side elevation of the pulley.

Fig. 2 is a plan View thereof. v a

Fig. 3 is airedge elevation,

Fig. 4 is a perspective View of one of the frame members. p I

Fig. 5 is an elevation of the strap member.

Fig. 6 is a fragmentary plan view showing a slight modification.

Referring more particularly to the drawings, 11 designates a groovedsheave of wood or other suitable material, mounted in a frame composedof a pair of similar memhere 12 and a strap 13. The sheave is rotatablymounted in the frame by means of a spindle 14 and is held from rubbingon the frame and strap by washers or a hub, designated 15.

- Each of the frame members 12 is formed of a piece of heavy wire orlight rod bent to the form shown in Figure 4. The wire forming the framemember is in the embodiment illustrated bent as. follows :At one end aloop or eye 16 is provided. The wire Serial No. 54,459.

18 and, at the opposite end of the semicircular portion from the loop16, the wire is bent to form a loop 19. The loops 16, 18 and 19 areformed inside the curve of the semicircular portion, as clearly shown,and each loop is of substantially the same internal diameter as theexternal diameter of the wire itself. From the loop 19 the wire extendsin a substantially straight portion 20 to the loop 16 and is bentapproximatel at right angles at 21, so as to pass throng the loop 16.Midway of its ends, the straight portion 20 is formed into a dependingloop 22 of a size to tightly hold the spindle 14. Beyond the loop 16 thewire is bent at approximately right angles, as at 21', in the oppositedirection to the bend 21, the two bends being so closely spaced that theloop 16 is held tightly between them. Beyond the bend 21*, the wire isbent in substantially semicircular form, as at 23, the portion 23 lyingin a plane at right angles to the plane of the portion 17. Beyond thesemicircular portion 23, the wire is'bent at approximately right angles,as at 24, and then continuesfor a short distance in a straight line toits extremity, thus forming a straight portion 25 approximately at rightangles to the straight portion 20 and in axial alignment with the eye16.

The strap'member 13 comprises a piece of wire bent to approximatelyU-shape at its centre to form a large loop26, by means of which thepulley may be suspended from a hook or the like. Beyond the loop or U-shaped portion'26, the two arms 27 of the wire are offset outwardly, asat 28, so as to space the two arms sufiiciently apart to receivethe'pulley sheavebetween them. These arms then extend in anapproximately straight line to nearly their extremities,

where they are bent sharply toward one an- 2 other, as at 29. Thedistance between the offsets 28 and the inturned ends 29 is slightlygreater than the diameter of the pulley sheave. Midway between theoffsets 28 and the inturned ends 29 the strap arms 27 are bent intoloops 30 of a size to receive the spindle 114.

Theelements of the frame and thesheave 'may, beassembled together in avariety of ways as may be found most convenient. One such method ofassembly is to connect two frame members 12 together by passing theextremity 25 of each member through the loop 19 of the other member andthen bending the portion (if each member upon the portion 20 of theother member, as illustrated at 31, Figures 1 and 2. This method ofassembly forms a frame adapted to en'- circle the pulley sheave slightlyabove what may be termed its horizontal diameter, as will be seen inFigures 1 and 2. l/Vhen the frame is properly proportioned to thesheave, the loops 16 and 19 lie inside theplanes of the sheave flanksand so close against the outer edge of the sheave flanges as to preventa rope climbing out of the sheave groove from entering between, thesheave and the frame members 20. The portions 23 of the frame formkeepers to retain a rope on the sheave. The strap member 13 is nowpassed between the portions 20 of the frame and its lower inturned ends29 passedinwa rdly through the loops 18 of the frame and bent over asat'32, Figures :5 and e ro make the connection permanent. The strap maynow be swung to one end ofthe frame topermit insertion ofthepulleysheave and,then moved into a position at right angles tothe frameportions 20', as clearly shown in Fig tire l. WVhen thus moved, theloops 30 of the strap member will register with the loops 22 of theframe members and the spindle 14 may be passed through all roar loopsand through the sheave, washers as indicated at 15 being inserted asdesired, or if the pulley hasno hub' projecting beyond flanks. Thespindle is preferably a tight drivingvfit the loops 22 and 30 so toinake'the frame rigid. The ends of the spin le now be slightly burredover to hold the same a ainst escape. When th'u's assembled, the offsets28 of the strap memher he close tothe sheave flanges. and. prevent arope which may climb either flange from nterlng between the sheave andthe strap ,rnennber. I I p p In theembodiment illustrated, the loops 22are formed Within thesemicircle of the frame, in which casethe frameportions 20 cpcupy' positions above the diameter of the sheave but, itwill be understood that this not essential, arid that the loops 22 maybe turned outwardly. It will also be seen that both loops30 of the strapmember are formed on oiie side thereof, so that the strap memberoccupies a plane slightly to one side of thelve'rtical diameter of thesheave. This disposition of the loops is purely a matter "6 conveniencein bending the wire and it be understood thatthe loops may be turned inopposite directions if desired. The loops 16, 18 and 19 are formedwithin the semicircle of the frame, principally to impart a smooth outeredge to the frame, and it will be understood that this inward ttirningof the loops is not essential but may be departedfrom andthesemicircular portions 17, thereby brought closer to the periphery of thesheave.

In Figure 6, there alienate a slight modification of the framemeinh'ersin' which the part 23 corresponding to the part 23 of Figure 2is turned inwardly instead of outwardly, as in Figure 2, for the purposeof confining a rope more closely to the groove of the sheave. Such aformation of the frame will not permit the passage of a knot or otherenlargement on the rope, such as would pass through a name formedaccording to Figure 2.

From the foregoing description, it; understood that the invention is notcon? fined to the details of the embodiment illus trated but is capableof modification in a ariet-y of ways as may be convenient or'expedientin manufacture and use, andftlrft all such modified forms as fall withinthe scope of the appended cranes are deemed to be included in and to"form a part of the invention. I I w A Having thus described my invention,What- I claim is I,

1. In a device or the class ae cribedya sheave and a frame enclosing thesheave comprising a pair of members, each formed of a single piece ofwire bent to'sern'ici rciilar shape and provided at the ends and centreof the curved edge thereof with ldop's, said wire beii'igpassed adjacentone of'i'ts erids thr'oi'iglr a loop formed at the other er'rd andleaving a'pr'ojecting' portion adapted forms'rtion through a loop of theotherrneinber, a strap member connected at its ends to said similarmembers, all three of said frame members being anned with nope" for thepassage of a spindle to si'ipport the sheave;

2. In a device of the class described, a sheave and a frame comprisingthree members, two of which are sinner and formed of wire, eachincluding a sei'nicirciilar porti on, loops at the ends, and centre ofs'iich semicircular portion, a straight portion havmg a loop at itscentre and eitending from are sh'oil'lder' passing throngh an end loopof the other of the two members, and a strap member secu ed at its endsin the centre loops of the semicircular portions and formed to provideapertures in register with the centre loops of the straight portions ofthefirst named members for thepassage of a" spindle, and a spindlepassing throngh the loops of the frame members and the, apertii're ofthe strap member and throngh the sheave and connecting the strap memberand trains members and rotatably siippdrting the sheave.

3. In a device of the class dscribed,.a grooved sheave and frameenclosing the sheave formed of wire, said frame projecting inwardly ofthe planes of the sheave of the'sheave to hold a rope in the sheavegroove against climbing out of the groove and entering between theflanks of the sheave and the frame.

4. In a device of the class described, a grooved sheave and a frameenclosing the sheave comprising a pair of semicircular members ofslightly greater diameter than the sheave and located in planes slightlyinside the planes of the sheave flanks whereby said members constitute aguard beyond the periphery of the flanges forming the sheave groove, apair of substantially diametrically arranged members each connecting theends of one of the semicircular members, said diametrical members beinglocated outside the planes of the sheave flanks and each provided withan aperture midway of its ends, each of said semicircular members beingformed integral with one of the diametrical members and constituting aframe member, connecting means extending between the frame members atthe ends of the diametrical members and each formed integral with one ofthe members and inserted through an aperture of the other member, eachof said frame members with the attached connecting member being formedof a single piece of wire, and a strap member presenting apertures inali nment with the central aperture of the iametrica'l frame memberportions, said strap member being bent at its ends around thesemicircular frame member portions, and a spindle passing through thestrap member and frame member apertures and connecting the same togetherand supporting the sheave.

In witness whereof, I have hereunto set my hand.

EDWARD M. ADAMS.

